Staple



May 29, 1928. 1,671,895

J. FRITZ STAPLE Filed May 26, 1927 WITNESSES V INVENTQ Za/vd: 2 BY ATTORNEYS Patented May 29, 1928.

J'OHN FRITZ, OF NEW BEDFORD, MASSACHUSETTS.

STAPLE.

Application filed May 26,

This invention relates to staples, and refers more particularly to staples such as are used for fastening portions of boxes produced from comparatively stout material, such as corrugated paper.

The principal object of the present invention is the provision of a staple whose legs or prongs are reinforced or ribbed to facilitate the piercing of the material, and which obviates bending of the legs or prongs in the piercing and fastening operation.

The nature of the invention and its distinguishing features and advantages will appear when the following specification is read in connection with the accompanying drawing, in Which- Figure 1 is a perspective view of a staple embodying the present invention.

Fig. 2 is a central vertical sectional view through the staple and showing the manner in which it is applied, the legs or prongs being shown in dotted lines in bent condi-, tion to illustrate the manner in which parts of a box, shown in dot and dash lines, are fastened together.

Fig. 3 is a sectional view taken on the line -33 of Fig. 1, and looking in the direction indicated by the arrows.

It has been found in attemptin to'fasten together parts of a box made 0 comparatively stout material such as corrugated paper, that prongs of a staple of the usual kind bend in piercing the material to effect the fastening together of separate portions thereof, because the prongs lack the necessary strength or are not reinforced properly to permit impaling or piercing of the material.

In accordance with the present invention there is provided a staple 10 comprising a top bar or connecting portion 11 between legs or prongs 12. Each of the prongs 12 is provided with a pointed end 13. In order to. reinforce each pron 12 to give greater strength and rigidity tiiereto each prong is provided with a reinforcing rib 14. The

1927. Serial No. 194,407.

rib 14 is provided by distending the material to provide in the length concavo-convex formation of each prong a The rib 14: of

each prong 12 extends to points short of the opposite ends of the prongs 12. The

necting portion 11. Such position of the ribs 14 on provision and disthe prongs 12 respectively facilitates piercing of the material by the prongs 12, which will have the necessary rigidity and be prevented from bending in the middle, or no bend should occur. It

cated on each prong, will at a point where is to be observed, however, that the reinforcing rib 14 as lonot interfere with the bending of each prong after the prongs have been extended through the portions of the material to be fastened together.

referring to Fig. 2,. it will y be apparent that,

each prong 12 may be bent on itself between one end of its rib 14: and the juncture be tween the prong and top bar 11. therefore be obvious that- It wiil the staple can be used to fasten together flaps or folds of boxes whose combined thickness is approximately one-quarter of an inch, without affecting the ribs of the prongs 12.

The staple is stamped,

bent and formed from a single piece of material, preferably of sheet metal.

I claim:

*1. A staple stamped, bent and formed from a single piece of metal to provide ribbed prongs, the rib of each prong termi nating short of the opposite ends of the prong.

2. A staple stamped, bent and formed from a single piece of m aterial to provide prongs each having a concavo-convex rib,

and the rib of each prong of the opposite ends of the terminating short prong. JOHN FRITZ. 

